Rank KCl,CO2, and CH20 in order from highest to lowest boiling point.?

KCl, or potassium chloride, is a salt, much like common table salt, and boils around 1500*C, if memory serves me.

CH2O, known as formaldehyde or methanal, comes next. Methanal boils around -19*C and is usually stored in a solvent like water.

CO2, or carbon dioxide, has the lowest boiling point. It sublimes (goes directly from solid to gaseous phase) at about -78*C.

Hope that settles everything.

Cheers.

Butanoic Acid Butanol Diethyl Ether Butanal Butane Butanol and diethyl ether have the same formula but the branching is different. Since butanol is linear, it has stronger Van Der Waal forces.

All you have to do is look at your electron negativiy scale and the types of bonds that these molecules are composed of.